import java.util.Scanner;

public class StringTest3 {
    public static void main(String[] args) {
        // 键盘录入一个字符串
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个字符串：");
        String str = sc.next();
        //定义三个计数器
        int bigCount = 0;
        int smallCount = 0;
        int numberCount = 0;
        //获取这个字符串的长度遍历字符串
        for(int i = 0;i < str.length();i++){
            char a = str.charAt(i);
            if(a >= 'a' && a <= 'z'){
                smallCount++;
            } else if (a >= 'A' && a <= 'Z') {
                bigCount++;
            } else if (a >= '0' && a <= '9') {
                numberCount++;
            }
        }
        System.out.println("大写字母有："+ bigCount +"个");
        System.out.println("小写字母有："+ smallCount +"个");
        System.out.println("数字有："+ numberCount +"个");
    }
}
